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Trends in global ocean surface wave characteristics as represented in the ERA-Interim wave reanalysis for 1979-2010 期刊论文
JOURNAL OF MARINE SCIENCE AND TECHNOLOGY, 2018, 卷号: 23, 期号: 1, 页码: 2-9
作者:  Wu, Lingli[1];  Qin, Jie[2];  Wu, Teng[3];  Li, Xing[4]
收藏  |  浏览/下载：4/0  |  提交时间：2020/01/02
Students performance between classical and online education: a comparative study 期刊论文
International Journal of Continuing Engineering Education and Life-Long Learning, 2016, 卷号: Vol.26 No.4, 页码: 359-371
作者:  KhalidM.O.Nahar;  MohammedM.AbuShquier;  IzzatAlsmadi
收藏  |  浏览/下载：4/0  |  提交时间：2019/12/24
区位基尼系数的计算、性质及其应用 期刊论文
2015
戴平生
收藏  |  浏览/下载：3/0  |  提交时间：2016/05/17
Priming stimulation of basal but not lateral amygdala affects long-term potentiation in the rat dentate gyrus in vivo 期刊论文
Neuroscience, 2013, 卷号: 246, 页码: 13-21
作者:  Li, Z.;  Richter-Levin, G.*
收藏  |  浏览/下载：3/0  |  提交时间：2019/12/03
A new online fault prognosis on steam turbine generator set by using frequency trend feature of vibration signal 期刊论文
Journal of Information and Computational Science, 2011, 卷号: 8, 期号: 16, 页码: 4023-4043
作者:  Yan, Changfeng;  Wu, Lixiao;  Zhang, Hao
收藏  |  浏览/下载：0/0  |  提交时间：2020/11/14
The study of encoding principle and encoding disc design of a new-style vernier absolute encoder (EI CONFERENCE) 会议论文
2nd Annual Conference on Electrical and Control Engineering, ICECE 2011, September 16, 2011 - September 18, 2011, Yichang, China
Ai H.; Li L.
收藏  |  浏览/下载：20/0  |  提交时间：2013/03/25
Application of particulate reinforced aluminum matrix composite in airborne photoelectric turret (EI CONFERENCE) 会议论文
2011 International Conference on Electric Information and Control Engineering, ICEICE 2011, April 15, 2011 - April 17, 2011, Wuhan, China
Cheng Z.-F.; Zhang B.; Dai M.; Wang P.; Huang M.
收藏  |  浏览/下载：19/0  |  提交时间：2013/03/25
In order to design and manufacture more excellent airborne photoelectric stable turret  modulus of elasticity of 213 GPa and thermal expansion coefficient of 7.9106/K. The frame has decreased the maximum deformation by by 60% and increased the fundamental frequency by 65% as compared with those of aluminum alloy materials  a new type of aeronautical material-particulate reinforced aluminum matrix composite (SiC/Al composite) is investigated. Several crucial technologies  respectively as shown by finite element analysis results. Those are confirmed by vibration test furthermore. Therefore  such as pressureless infiltration technology  a significant lightening effect is achieved and the thermal control load is also reduced. The test result indicates that the stable accuracy of the system achieves 19.8rad and the optical-axis parallelism of pay load is 0.1mrad. The research applies the SiC/Al composites to airborne photoelectric platforms  interface reaction controls and plate's welding are systematically studied. Then  which makes a effective exploration for the new aeronautical material's application. 2011 IEEE.  using SiC/Al composites  the airborne photoelectric stable turret frame is successfully prepared in density of 2.94 g/ cm3  
基于位平面游程变化的LSB隐秘分析 期刊论文
2010, 2010
朱刚; 王道顺; 陈光喜; ZHU Gang; WANG Dao-shun; CHEN Guang-xi
收藏  |  浏览/下载：4/0
Image compression based on contourlet and no lists SPIHT (EI CONFERENCE) 会议论文
2010 International Conference on Computer, Mechatronics, Control and Electronic Engineering, CMCE 2010, August 24, 2010 - August 26, 2010, Changchun, China
Zhang S.; Xue X.; Shi J.
收藏  |  浏览/下载：39/0  |  提交时间：2013/03/25
The volume of raw image data captured by the high resolution camera is extremely huge. Thus the efficient image compression method should be used to decrease the bit rate. The image compression method based on wavelet is used more widely nowadays. However  two dimensional wavelet is only the tensor product of the one dimensional wavelet whose support region of basis function is extended from interval to square. Contourlet is an image multiscale geometric analysis tool  which could represent image sparsely and has strong capability of nonlinear approximation. The basis function of contourlet is multidirectional and anisotropic. Nevertheless  contourlet is redundant. So the non-redundant Wavelet Based Contourlet Transform (WBCT) is used in this paper. The SPIHT algorithm is very efficient way to coding the significant coefficients. And the improved no lists SPIHT is more easy to implemented by hardware. Image compression method based on the combination of both wavelet based contourlet transform and no lists SPIHT coding is proposed in the paper. Experiment shows that compared to wavelet based scheme the contourlet scheme can reserve the texture of the image. For barbara test image when coding at low bit rate the PSNR can improve about 0.2dB. 2010 IEEE.  
Influence of spatial temperature distribution on high accuracy interferometric metrology (EI CONFERENCE) 会议论文
5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, April 26, 2010 - April 29, 2010, Dalian, China
Gu Y.; Miao E.; Yan F.; Zhang J.; Yang H.
收藏  |  浏览/下载：21/0  |  提交时间：2013/03/25
We calculate the influence of temperature change on the refractive index of air  establish a model of air temperature distribution and analyze the effect of different temperature distribution on the high accuracy interferometric metrology. First  a revised Edlen formula is employed to acquire the relation between temperature and refractive index of air  followed by introducing the fixed temperature gradient distribution among the spatial grid within the optical cavity between the reference flat and the test flat of the Fizeau interferometer  accompanied by a temperature change random function within each grid. Finally  all the rays through the air layer with different incident angles are traced by Matlab program in order to obtain the final output position  angle and OPD for each ray. The influence of different temperature distribution and the length of the optical cavity in on the testing accuracy can be analyzed through the RMS value that results from repeatable rays tracing. As a result  the horizontal distribution (vertical to optical axis) has a large effect on the testing accuracy. Thus  to realize the high accuracy figure metrology  the horizontal distribution of temperature must be rigorously controlled as well as to shorten the length of the optical cavity to a large extent. The results from our simulation are of great significant for the accuracy analysis of interferometric testing and the research of manufacturing a interferometer. 2010 Copyright SPIE - The International Society for Optical Engineering.  

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